**Definitions:**

**Centimeter** (abbreviation: **cm**): is a unit of length in the SI metric system, equal to one hundredth of a metre, centi being the prefix for a factor of 1/100. The centimetre was the base unit of length in the now deprecated centimetre–gram–second (CGS) system of units.

**Kilometer** (abbreviation: **km**): is a unit of length in the SI metric system, equal to one thousand metres (kilo- being the prefix for 1000). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world countries.

## How to Convert Centimeters to Kilometers

*Example: How many kilometers are equivalent to 23.78 centimeters?*

As;

1 centimeters = 1.0E-5 kilometers

23.78 centimeters = Y kilometers

Assuming Y is the answer, and by criss-cross principle;

Y equals 23.78 times 1.0E-5 over 1

(i.e.) Y = 23.78 * 1.0E-5 / 1 = 0.0002378 kilometers

Answer is: 0.0002378 kilometers are equivalent to 23.78 centimeters.

*Practice Question: Convert the following units into km:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 29.58 cm

( ii ) 81.12 cm

( iii ) 56.38 cm